CVE-2026-9959
Google Chrome WebRTC Cross-Origin Data Leak
Description
Race in WebRTC in Google Chrome on Windows prior to 148.0.7778.216 allowed a remote attacker to leak cross-origin data via a crafted HTML page. (Chromium security severity: High)
INFO
Published Date :
May 28, 2026, 11:16 p.m.
Last Modified :
May 29, 2026, 8:38 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
Affected Products
The following products are affected by CVE-2026-9959
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | LOW | 134c704f-9b21-4f2e-91b3-4a467353bcc0 |
Solution
- Update Google Chrome to version 148.0.7778.216 or later.
- Apply vendor patches as soon as they are available.
Public PoC/Exploit Available at Github
CVE-2026-9959 has a 1 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-9959.
| URL | Resource |
|---|---|
| https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_0877304591.html | Release Notes |
| https://issues.chromium.org/issues/504557432 | Permissions Required |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-9959 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-9959
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
DSA and DLA for Debian last 14 days
Python
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-9959 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-9959 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
May. 29, 2026
Action Type Old Value New Value Added CPE Configuration AND OR *cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:* versions up to (excluding) 148.0.7778.216 OR cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* Added Reference Type Chrome: https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_0877304591.html Types: Release Notes Added Reference Type Chrome: https://issues.chromium.org/issues/504557432 Types: Permissions Required -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
May. 29, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N -
New CVE Received by [email protected]
May. 28, 2026
Action Type Old Value New Value Added Description Race in WebRTC in Google Chrome on Windows prior to 148.0.7778.216 allowed a remote attacker to leak cross-origin data via a crafted HTML page. (Chromium security severity: High) Added CWE CWE-362 Added Reference https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_0877304591.html Added Reference https://issues.chromium.org/issues/504557432